Method of making eyepiece-caps.



1.1. BAUSCHZ METHOD OF MAKING EYEPIE CE GAPS. I APPLICATION FILEDJAN-25, i911.

Patanted Jan. 29, 191 Q INv NTUR 0M6. M ATTURNEYS.

. UNITED STATES PATENT OFFICE.

IOEN i BAUSOH, 01-" ROCHESTER, NEW YORK, ASSIGNOR "10 BAUSGH is 530MBOPTICAL COMPANY, OF ROCHESTER, NEW YORK, A. CORPORATION OF NEW YORK511E013 on ma RING nYnPmcn-oers.

Speclfloafion a: Letter: latent.

Patentod Jan. 29, 1918.

Application filed January 25, 1917. Serial No. 144,382.

To all whom it may concern:

Be it known that 1, JOHN J. BAUBCH, a citizen of the United States,residin at ltnohoster, in tho county of Monroe, tote 5 ofiN w York, haveinvented certain new and useful Improvements in Method of Mak ingEyepiece-Cops; and I do declare tho'following to ban full, clear, andexact description ofjho invention reference being hntl' tovthe'accompanying drawings and to .thoolmrnctrs of reference nim-keclthereon. "llfi's ink vnfion relates to oops or guards :uloptocl toliiyfitto'd to the outer ends of eye piecosof ulorge variety of opticalinstgninonts for guarding the eye piece and. its (gong mod lenses frominjury and for facilitatln'gg nqlj letp-mntof the oyo to thoinstrume'htf Y -Thejnvontionhns for its object to provido anjmproyodmethoclof making an eye piece cop hich hash-pleasing appearance, and is,li 'ht mweight and has great sti-on th assuring maximum durability andw ioh perin "'tlxouso of'n comparatively light'vulca. iznjolo compoundfor coin ressive incorp I l on" vitli"i 1 sogow thtee ed or groovedo'iubthoflvire m'ilohi'nod reinforcing ferrule '1 which tho:oompouiiifi'vuloanized later yecloeodtofinishod form by re- --v .I L' gsu lfl W F-Q F'g'n e I'i' Jo rose sectional view of a ring mifplnstio"hilcttniznhle compound first Z etlj in'thofnow" preferredprocess of making tho joyofp'ieco. Fig. 2 is a partially "ofifreinfqi'oing fe jrnlo later incorporated jgwithgtlioi compjnnd ring; bypressureand ..mloh'nifiottonrfjig; 8' is o seotionul' view hon? gjthoferrul'o plncodf tvithin' the face oveof' the nni nloiinizod I oompou ndring. I FL slhowisfin joxos 'section'ytlle win a j i'zrulfo gs; whenintimately-pom med.- pre'si'on' in o mold and. utter vu l ea'n1-. 1othoroi' andFigffiisn cross sechonal ion. 91 final vulcanized t erein.nromld parts of a sore-w ily cut-and shape compound tobe molded toproper form, for

'hmlcepiputs oo "de viowofonegfo'rm .gr

has serratlons-7 at .ltS mner edge and also and 'jptroyed. oyo pieco'cap inits" threaded or grooved or olherwiSo maehmetl reinforcin motelferrule of the eye piece. Such senn-plnstm compound may be and cn'nizodcompouml havmg a. proper degree of pIa-stmit one} toughness to allowsheets or plates rolled or (pressed from it to be readby dies,.or.toallow the subjection whetherdie shapelor molclod'to the varioussubsequent operations involved 1n the cap foimin process.

The drawings llustrttte by way of example the production of an eyepieeelca' l18.\"' 1l1 incorporated with the-plastic w canlzo lo compounda reinforcing metal ferrule having an internal-screw thxead, but atermle lmving I an external thread "or one that 1s mterno-lly orexternally 'gtooved or otherwise machined 'may-iibofusei it desired. F1?1 shows wring 1 of the above named 'vulcnnizable compound which fmoyeither he 'clle-cut'and ,shaped by. a single bloyt irom sheet orplate'of the coxnpound or may-be molded from a 'plastiogmass of saidcompound. "This 'ring "has fart annular face groove 2, and thegroove-wall 3. to later be next or faoin the'scrwthread of the apphedmetal erruIe-S, is depressed below the level oft'the-o posite groovewall 6, but should an oxterlm ly -sorevt threaded ferrule housed theinner groove wellwould be higher than its outer well. After the ring 1is-forn1ed,the metal ferrule 5, shown separutoly' in Fig.2, is insertedwithin the ring oot'o 2, as shown .in-.Fig.. 3.-.- This ierrule holdingtheisorew ferrule; 5-, is placed in a preferubly-uheatetlcompressingmold and is r therein reducedto-the form illustrated in Fig. 4, whichshows that the vulcanizable compound of-th e ring 1,.;is forcetl intointimate interlock-111g engagement wlth the screw threodl, thexfia'red.ed portion 8 and-tho edgo seryat'ions. Lott-e metal ferrule 5. The partsare thus .interlockecl under c'ompltosslon. end in relation shown in-ig. 4, wherein the compressed compound ring ie'morkod-Q, because itdiffers. in form from that of the nnvulcanizocl ring 1 of Figs. 1 and 3,of the rimwings; The mold is now .subjectod to heat in the usual winnerto

